All vulnerabilities
CVE-2026-86828

BackWPup < 5.7.7 - Admin+ Path Traversal to RCE via Restore PclZip Fallback

Unknown BackWPup
Open in ThreatlineRecord JSON
CVSS
6.6Medium
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.42%Chance of exploitation activity in the next 30 days, higher than 35% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in5.7.7Fixed versionCVE List
Published8 Oct 2026Updated 8 Oct 2026CVE List

What fixes it

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Description

The BackWPup WordPress plugin before 5.7.7 does not properly restrict the destination path of files extracted during a backup restore when its fallback archive library is used, allowing high-privileged users to write files outside the intended restore directory, potentially leading to remote code execution.

Text from CVE List

Affected versions 1

  • BackWPupaffected: all versions before 5.7.7CVE List

References 1